EP 1806673 A3 20090429 - Digital content management system using electronic watermark
Title (en)
Digital content management system using electronic watermark
Title (de)
Verwaltungsystem für digitalen Inhalt mit digitalen Wasserzeichen
Title (fr)
Système de gestion de contenus numériques utilisant du filigrane électronique
Publication
Application
Priority
- JP 17316897 A 19970613
- EP 98110563 A 19980609
Abstract (en)
[origin: EP0884669A2] A system for managing a digital content, particularly a digital content to which a copyright is claimed, and a system for supplying a public-key which is used in the management of the digital content are provided. The digital content management program is embedded to an operating system of a user apparatus as a micro-kernel, a watch program or a watch command which is linked to the digital content management program is transmitted to the user apparatus by using a network or data broadcasting, and thereby, the illegitimate usage of the digital content is watched. A visible watermark is added to the digital content when illegitimately utilized, to restrain later usage. Even in regular usage, the route of copying or transferring the digital content can also be ascertained by adding an invisible watermark. Further, a public-key is put in a public-key distribution screen to be distributed by the network or broadcasting. Image data to which information on owner of the public-key or on the user is added as an invisible electronic watermark, is entered to the public-key distribution screen, so that the authenticity of the public-key and the user is checked by the electronic watermark. <IMAGE> <IMAGE>
IPC 8 full level
G06F 1/00 (2006.01); G06F 12/14 (2006.01); G06F 9/46 (2006.01); G06F 21/10 (2013.01); G06F 21/16 (2013.01); G06F 21/60 (2013.01); G06F 21/64 (2013.01); G06T 1/00 (2006.01); G09C 1/00 (2006.01); G09C 5/00 (2006.01); H04L 9/08 (2006.01); H04L 29/06 (2006.01); H04N 1/32 (2006.01); H04N 1/44 (2006.01); H04N 7/08 (2006.01); H04N 7/081 (2006.01)
CPC (source: EP US)
G06F 21/10 (2013.01 - EP US); G06F 21/16 (2013.01 - EP); G06T 1/0021 (2013.01 - EP); H04L 63/0442 (2013.01 - EP); H04L 63/062 (2013.01 - EP); H04N 1/32144 (2013.01 - EP); H04N 1/4486 (2013.01 - EP); G06F 2211/008 (2013.01 - EP); G06F 2221/2135 (2013.01 - EP); H04L 2463/101 (2013.01 - EP); H04L 2463/103 (2013.01 - EP); H04N 2201/3233 (2013.01 - EP); H04N 2201/3269 (2013.01 - EP); H04N 2201/327 (2013.01 - EP)
Citation (search report)
- [Y] US 5155680 A 19921013 - WIEDEMER JOHN D [US]
- [Y] WO 9618152 A1 19960613 - INTEL CORP [US]
- [DA] EP 0704785 A2 19960403 - MITSUBISHI CORP [JP]
- [DA] EP 0715241 A2 19960605 - MITSUBISHI CORP [JP]
- [DA] EP 0719045 A2 19960626 - MITSUBISHI CORP [JP]
- [A] EP 0459046 A1 19911204 - IBM [US]
- [A] KOMATSU N ET AL: "A PROPOSAL ON DIGITAL WATERMARK IN DOCUMENT IMAGE COMMUNICATION AND ITS APPLICATION TO REALIZING A SIGNATURE", ELECTRONICS & COMMUNICATIONS IN JAPAN, PART I - COMMUNICATIONS, vol. 73, no. 5, PART I, 1 May 1990 (1990-05-01), pages 22 - 33, XP000159282
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0884669 A2 19981216; EP 0884669 A3 19990506; EP 0884669 B1 20070404; DE 69837459 D1 20070516; DE 69837459 T2 20071213; EP 1806673 A2 20070711; EP 1806673 A3 20090429; EP 1811419 A2 20070725; EP 1811419 A3 20081029; JP 4053628 B2 20080227; JP H117241 A 19990112
DOCDB simple family (application)
EP 98110563 A 19980609; DE 69837459 T 19980609; EP 07001022 A 19980609; EP 07001023 A 19980609; JP 17316897 A 19970613